The Collaborative International Dictionary of English v.0.48:

Saurel \Sau"rel\, n. (Zool.)
   Any carangoid fish of the genus Trachurus, especially
   Trachurus trachurus, or Trachurus saurus, of Europe and
   America, and Trachurus picturatus of California. Called
   also skipjack, and horse mackerel.
   [1913 Webster]

WordNet (r) 3.0 (2006):

saurel
    n 1: large elongated compressed food fish of the Atlantic waters
         of Europe [syn: horse mackerel, saurel, Trachurus
         trachurus]
    2: a California food fish [syn: horse mackerel, jack
       mackerel, Spanish mackerel, saurel, Trachurus
       symmetricus]